Answer from yesterday: They were all invented by women.
1. The windshield wiper.
Mary Anderson invented the first windshield wiper, and received a patent for it in 1905.
2. The home diabetes test.
Helen Free invented the home diabetes test. She was also one of the world's leading experts on urinalysis.
3. Liquid Paper.
Bette Nesmith Graham, invented Liquid Paper, which was originally called "Mistake Out."
Now, what would have happened if the lady who invented Liquid Paper had married one of the guys who invented Spell Check? Would all of our misspelled words be invisible?